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Finding the Fourth Proportional to 149.40, 223.06 and 143.70

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Solution

The fourth proportional to 149.40, 223.06 and 143.70 is: 214.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.40 : 223.06 = 143.70 : x
  2. Step 2: Convert to fraction form
    149.40/223.06 = 143.70/x
  3. Step 3: Cross multiply
    149.40x = 223.06 × 143.70
  4. Step 4: Simplify right side
    149.40x = 32,053.72
  5. Step 5: Solve for x
    x = 32,053.72/149.40
  6. Step 6: Final answer
    x = 214.55

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.